#! /usr/bin/python -E
# Authors: Rob Crittenden <rcritten@redhat.com>
#
# Copyright (C) 2007  Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2 only
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
import sys
try:
    from optparse import OptionParser
    import ipa
    import ipa.group
    import ipa.ipaclient as ipaclient
    import ipa.config
    import ipa.ipaerror

    import xmlrpclib
    import kerberos
    import ldap
    import errno
    import socket
except ImportError:
    print >> sys.stderr, """\
There was a problem importing one of the required Python modules. The
error was:

    %s
""" % sys.exc_value
    sys.exit(1)

def set_add_usage(which):
    print "%s option usage: --%s NAME=VALUE" % (which, which)

def parse_options():
    usage  = "%prog [-l|--list]\n"
    usage += "%prog [-a|--add] [-r|--remove] [-v|--verbose] user group\n"
    usage += "%prog [-g|--groupadd] [-e|--groupdel] [-v|--verbose] group group\n"
    usage += "%prog [-d|--desc description STRING] [--addattr attribute=value] [--delattr attribute] [--setattr attribute=value] [-v|--verbose] group"
    parser = OptionParser(usage=usage, formatter=ipa.config.IPAFormatter())
    parser.add_option("-a", "--add", dest="add", action="store_true",
                      help="Add a user to the group")
    parser.add_option("-r", "--remove", dest="remove", action="store_true",
                      help="Remove a user from the group")
    parser.add_option("-g", "--groupadd", dest="groupadd", action="store_true",
                      help="Add a group to the group")
    parser.add_option("-e", "--groupdel", dest="groupdel", action="store_true",
                      help="Remove a  group from the group")
    parser.add_option("-d", "--description", dest="desc",
                      help="Modify the description of the group")
    parser.add_option("--addattr", dest="addattr",
                      help="Adds an attribute or values to that attribute, attr=value",
                      action="append")
    parser.add_option("--delattr", dest="delattr",
                      help="Remove an attribute", action="append")
    parser.add_option("--setattr", dest="setattr",
                      help="Set an attribute, dropping any existing values that may exist",
                      action="append")
    parser.add_option("-l", "--list", dest="list", action="store_true",
                      help="List common attributes (this is not an exhaustive list)")
    parser.add_option("-v", "--verbose", action="store_true", dest="verbose",
                      help="Verbose output of the XML-RPC connection")

    ipa.config.add_standard_options(parser)
    options, args = parser.parse_args()

    if ((not options.add and not options.remove) and
        (not options.groupadd and not options.groupdel) and
        (not options.desc and not options.addattr and
        not options.delattr and not options.setattr and not options.list)):
        parser.error("need to specify at least one operation")

    if not options.list:
        if options.add or options.remove:
            ipa.config.verify_args(parser, args, "user group")
        elif options.groupadd or options.groupdel:
            ipa.config.verify_args(parser, args, "group group")
        elif options.desc or options.addattr or options.delattr or options.setattr:
            ipa.config.verify_args(parser, args, "group")

    ipa.config.init_config(options)

    return options, args

def get_group(client, options, group_cn):
    try:
        attrs = ['*']

        # in case any attributes being modified are operational such as
        # nsaccountlock. Any attribute to be deleted needs to be included
        # in the original record so it can be seen as being removed.
        if options.delattr:
            for d in options.delattr:
                attrs.append(d)
        group = client.get_entry_by_cn(group_cn, sattrs=attrs)

    except ipa.ipaerror.IPAError, e:
        print "%s" % e.message
        return None

    return group

def main():
    group=ipa.group.Group()
    options, args = parse_options()

    if options.list:
        client = ipaclient.IPAClient(verbose=options.verbose)
        list = client.get_all_attrs()

        for x in list:
            print x
        return 0

    client = ipaclient.IPAClient(verbose=options.verbose)
    if options.add:
        group = get_group(client, options, args[1])
        if group is None:
            return 1
        users = args[0].split(',')
        for user in users:
            client.add_user_to_group(user, group.dn)
            print user + " successfully added to " + args[1]
    elif options.remove:
        group = get_group(client, options, args[1])
        if group is None:
            return 1
        users = args[0].split(',')
        for user in users:
            client.remove_user_from_group(user, group.dn)
            print user + " successfully removed"
    elif options.groupadd:
        group = get_group(client, options, args[1])
        if group is None:
            return 1
        groups = args[0].split(',')
        for g in groups:
            tgroup = get_group(client, options, g)
            if tgroup is not None:
                client.add_group_to_group(tgroup.dn, group.dn)
                print g + " successfully added to " + args[1]
            else:
                print "Group %s not found" % g
    elif options.groupdel:
        group = get_group(client, options, args[1])
        if group is None:
            return 1
        groups = args[0].split(',')
        for g in groups:
            tgroup = get_group(client, options, g)
            if tgroup is not None:
                client.remove_member_from_group(tgroup.dn, group.dn)
                print g + " successfully removed " + args[1]
            else:
                print "Group %s not found" % g
    else:
        group = get_group(client, options, args[0])
        if group is None:
            return 1

        if options.desc:
            group.setValue('description', options.desc)

        if options.delattr:
            for d in options.delattr:
                group.delValue(d)

        if options.setattr:
            for s in options.setattr:
                s = s.split('=', 1)
                if len(s) != 2:
                    set_add_usage("set")
                    sys.exit(1)
                (attr,value) = s
                group.setValue(attr, value)

        if options.addattr:
            for a in options.addattr:
                a = a.split('=', 1)
                if len(a) != 2:
                    set_add_usage("add")
                    sys.exit(1)
                (attr,value) = a
                cvalue = group.getValue(attr)
                if cvalue:
                    if isinstance(cvalue,str):
                        cvalue = [cvalue]
                    value = cvalue + [value]
                group.setValue(attr, value)

        client.update_group(group)
        print args[0] + " successfully updated"

    return 0

try:
    if __name__ == "__main__":
        sys.exit(main())
except SystemExit, e:
    sys.exit(e)
except KeyboardInterrupt, e:
    sys.exit(1)
except xmlrpclib.Fault, fault:
    if fault.faultCode == errno.ECONNREFUSED:
        print "The IPA XML-RPC service is not responding."
    else:
        print fault.faultString
    sys.exit(1)
except kerberos.GSSError, e:
    print "Could not initialize GSSAPI: %s/%s" % (ipautil.get_gsserror(e))
    sys.exit(1)
except xmlrpclib.ProtocolError, e:
    print "Unable to connect to IPA server: %s" % (e.errmsg)
    sys.exit(1)
except ipa.ipaerror.IPAError, e:
    print "%s" % (e.message)
    sys.exit(1)
except socket.error, e:
    print e[1]
    print "Re-run with -v flag for more details."
except Exception, e:
    print "%s" % str(e)
    sys.exit(1)
